Ldap filter can use `;` character
Ldap filter can use `;` character

This change will allow user_field to contain characters such as `;`. This is useful because some of ldap attributes look like `login;organization`.
abelCoronado93/one,abelCoronado93/one,abelCoronado93/one,baby-gnu/one,OpenNebula/one,atodorov-storpool/one,abelCoronado93/one,baby-gnu/one,atodorov-storpool/one,abelCoronado93/one,OpenNebula/one,baby-gnu/one,baby-gnu/one,OpenNebula/one,atodorov-storpool/one,atodorov-storpool/one,atodorov-storpool/one,atodorov-storpool/one,OpenNebula/one,atodorov-storpool/one,OpenNebula/one,abelCoronado93/one,OpenNebula/one,atodorov-storpool/one,atodorov-storpool/one,baby-gnu/one,baby-gnu/one,OpenNebula/one,abelCoronado93/one,abelCoronado93/one,baby-gnu/one,baby-gnu/one,OpenNebula/one,OpenNebula/one